| Project/Area Number |
03650165
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Thermal engineering
|
|---|
| Research Institution | Hokkaido University |
|---|
Principal Investigator |
ISHIGURO Ryoji Hokkaido University, Nuclear Engineering, Professor, 工学部, 教授 (20001167)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ENOTO Takeaki Hokkaido University, Nuclear Engineering, Professor, 工学部, 教授 (10001992)
SUGIYAMA Kenichiro Hokkaido University, Nuclear Engineering, Associate Professor, 工学部, 助教授 (10002015)
|
|---|
| Project Period (FY) |
1991 – 1992
|
| Project Status |
Completed (Fiscal Year 1992)
|
| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1992: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1991: ¥1,800,000 (Direct Cost: ¥1,800,000)
|
|---|
| Keywords | Fluid temperature fluctuation / Wall temperature fluctuation / Thermal stress / Thermal fatigue / Prandtl number / Peclet number |
|---|
| Research Abstract |
For the sake of securing nuclear reactor safety or realizing longer life of them, problems of thermal fatigue in structure materials have been thought one of the important research subject. Although the main cause of the phenomenon is temperature fluctuation of the cooling liquid, it should be examined as a conjugate problem with conduction heat transfer in the structure material.
In the present research project, only the temperature fluctuations of a cooling liquid is examined as a first step.
It is said that occurrence of the thermal fatigue is especially severe for a liquid metal cooled reactor, but liquid metals in general are inconvenient in all respects for experimental procedures. Turning around the experimental difficulties, we looked at similarity relationship of temperature fluctuations between various cooling liquid, for the purpose of an experimental result of one liquid can use for others.
As a result of theoretical considerations, it is known that the similarity condition come into existence between two systems which Peclet numbers are same. In addition, boundary conditions of both fields are effective as well.
In the present research project, we examined what other conditions should be same to make the similarity by means of numerical calculations and experiments.
|
